"Many physicists now believe that the universe arose out of nothingness during the Big Bang which means that nothing must have somehow turned into something. How could that be possible? Due to the weirdness of quantum mechanics, nothing transforms into something all the time. Heisenberg's uncertainty principle states that a system can never have precisely zero energy and since energy and mass are equivalent, pairs of particles can form spontaneously as long as they annihilate one another very quickly. The less energy such a system has, the longer it can stick around. Thanks to gravity – the only force that always attracts – the net energy balance of the universe may be as close to zero as you can get. This makes its lifespan of almost 14 billion years plausible. If you take inflation into account, which physicists think caused rapid expansion in the early universe, we begin to see why MIT physicist Alan Guth calls the universe the "ultimate free lunch."

Announcements

When Life Gives You Lemons
We all have had hardships and made poor decisions. The important thing is how we respond and grow. Read the story of a Fool who started from nothing, and looks to gain everything.

Work for Fools?
Winner of the Washingtonian great places to work, and Glassdoor #1 Company to Work For 2015! Have access to all of TMF's online and email products for FREE, and be paid for your contributions to TMF! Click the link and start your Fool career.